Preformed composition strip and method op making same



A. C. FISCHER PREFORMED COMPOSITION STRIP AND METHOD OF MAKING SAME July 7, 1936.

Original Filed Dec. '7, 1925 Rash July 7, 193s UNITED STATES .P'ATENT OFFICE 20,020 ranroamtn oomosmon's'rmr sun sun:-

METHOD OF MAKING.

Albert 0. Fischer. cum, in, mm: to m Philip Carey Manufacturing Company, a cor poration oi Ohio Original No. 1,882,792, dated October 18,

Serial No. 73,831, December 7, 1925 1982, Appliestion mreissue January :1, me'sum No.

22 Claims. (Cl. 154-2) My improvement relates to rubberized pellets,

pulled grains, seeds, mineral wool'pellets,

sago, pulled rice, pulled wheat, fibrous matter which can be reduced to pellets, granules such as. cork, corn cobs, pithy matter, in fact any substance which may be inherently compressible, such as, sponge particles, certain seaweed, mosses.

in invention relates a immersing these pellets in latex and drying them. This may be accomplished by spreading the granules upon a sheet and spraying the latex over the granules,

andattertheupperlayeroilatexis dry,t hue. particles, adhered together by the latex, may be reversed onto another sheet and sprayed on the opposite side, so that the result will be a thin sheet ot'rubber having interspersed thruout the sheet, and closely. adjacent to each other, small pellets incased in'the rubber.

For a better understanding of the invention, reference will be made to the accompanying drawing, in which,

, Fig. 1 is a transversesection of laminated slab embodyins my invention, and Fig. 2 is a transverse section of anon-laminated slab.

The invention is typified by a sheetv or strip adapted to be employed in paving construction, such as streets, floors, walls and the like, to sep-' arate the concrete or other rigid sections of the construction at intervals and provide for contraction and expansion. Numeral 2 designates a laminated sheet or slab composedoi two or more individual layers 3, superposed and adhered by a suitable adhesive layer 4. Each of the individual layers-are fabricated from a composition com-' prising a mixture or rubber 5 and resilient granules 6.

An alternative structure 01' non-laminated form 'is shown-in Fig. 2. This in composition may be the same as the single layers I in Fig. 1 except 01' increased thickness, or granules 0 may be coated with a thin layer 01' rubber 'l, and the rubber coated granules then bonded with a bituminous binder I.

Should it be desired, double layers of this material may be joined together by forming single layers, then joining the layers by spraying one of the layers with latex and placing the other layer thereon. This sheet may be passed thru a vulcanizing medium, suitably arranged therefor, in order to vulcanize the rubber incasing said granules.

This sheet may be used for various construction materials, such as an inner core for an inlatex sulation material and floor covering. It may be used ior'the center core ot asphalt masses for compressible expansion joints, for various waterproofing purpom where waterproofing and insulation qualities are desired, also where resiliency and compressibility are desired.

Where the pellets are surrounded by the latex individually and not formed into a sheet they may be incorporated with other materials, such as, plaster, asphalt and any-suitable binding materiai. When formed individually the pellets are simply saturated and removed from'the saturant, allowing same to dry, butwhen prepared in a sheet they are uniformly distributed on a moving sheet, and the latex sprayed thereon in an uncoagulated state, it being understood that the herein described is a commercial latex in the uncoagulated state, approximately thirtythree (33%) per cent rubber, two (2%) per cent ammonia and sixty-five (65%) per cent water. When used as an expansion joint any suitable binding material may be. mp yed which is waterproof, ductile and elastic. and these pellets incorporated therein and mixed therewith in any In using these pellets for expansion-Joints it is preferred that they be vulcanized before being incorporated in the asphalt, or they may be vul-.

'canized at the time of incorporation with the.

binding material by mixing the vulcanizing agent with the binding material, which is readily heated and maintained at a temperature at which raw rubber is vulcanized.

When utilized as an expansion joint in the sheet form the prei'erred method would be to vulcanize the sheet and pass the same between suitable rolls, enveloping the sheet in asphalt .or any suitable binding means, or such binding means which may contain fibrous matter to prevent oozing of the product. It can be readily understood that said rubber sheet, -containing granular matter, would act as a very resilient material for expansion joints. When incorporated as an insulation material the sheet may be placed between two plaster layers rolled over the sheet by suitable rollers in form of plaster, the nbrated plaster being utilized for the purpose, or the granules themselves may be mixed with the plaster and the mass rolled into sheet iorm.

When utilized as insulation material it would be important that the contents of the granules be insulation material, such as, mineral wool,

asbestos ilbre, or the like, iniusorial earth, or

some form of pellet which is good as an insulator.

The rubber casing will tend to deaden the sound,

keep out the heat or cold as the case may be.

' ing belt may carry the pellets away from the vulgcanizing medium and permit it to dry as desired.

When'utilized in the sheet form a simple contrivance may be used for a moving belting arrangement, said belting surface being treated with talc or the like to prevent adhesion. The pellets are then fed on said belt or contrivance so as to form uniform distribution thereover, and

a spraying device erected over said belt, such as is usually employed for paint spraying, which will disperse uncoagulated latex and spray particles as they pass thereunder. The spraying would naturally form a coating over the granules and join them together into; a uniform sheet.

Any conveying arrangement can be erected over the lower conveying belt and the sheet then formed fed onto the upper conveyor belt, with the uncoated sides of the granular matter exposed, and another sheet of coating incasing the granules in a continuous sheet of uncoagulated latex. This sheet may then be .fed thru a vulcanizing medium, or may be employed in the object for which it is to be used without .vulcanizing, if so desired.

.1 claim:

1. The method of producing sheet material comprising a commingled mass of granular material and rubber binding material consisting in spreading granular material upon a surface, coating the exposed surface of the granular material with rubber, the application of the rubber being supplied tothe granular material in sumcient quantity to leave a surplus of the rubber betweenthe confronting surfaces of the granules in the form of connecting webs, and then forming the rubber coated granular material into a sheet. a

2. The method of producing sheet material comprising a commingled mass of granular material and rubber binding material consisting in spreading granular material upon a surface,

spraying the exposed surfaces oi the granular material with rubber, the application of the rub ber being supplied to the granular material in suflicient quantity to leave-a surplus of the rubber'fbetween" the confronting surfaces of the 'granules in the form of connecting webs, and then forming the rubber coated granular material into a sheet. a

' 3. The method of producing multiple layer sheet material of the class described, which consists in producingga commingled mass of granular. material and rubber binding material by spreading granular material upon a surface, coating the exposed surfaces of the granular materi'al with rubber, the application of the'rubber being in sumcient quantity to leave a surplus between the granules-in the form of connecting webs, forming the mass of rubber coated granules material into two or more sheets, superimposing the two sheets, thus produced in juxtaposed relation, and applying a' coating 'of rubber to the superimposed sheets for joining the same substantially as/and for the purpose described.

4. The method of producing sheet material of the class described, which comprises sifting a granular material evenly upon a surface, coating the exposed surfaces of the granular material with rubber latex, the latex being applied in sumtogether.

cient quantity to form a web between adjacent granules, formingcoated granules into a sheet, and finally vulcanizing said latex.

5. The method of producing sheet material of the class described, which comprises arranging granules of an inherently compressiblematerial upon a surface, spraying a surplus of uncoagulated latex over said granules, forming the latex.

treated granules into a sheet, and finally vulcanizing said uncoagulated latex.

6. A preformed compressible and elastic expansion Joint strip comprising a mass of resilient binding material and resilient elements distributed throughout said mass providing mass portions in which the resilient elements are freely contractible and expansible with the binding material.

7. A preformed compressible and elastic ex- .pansion Joint strip comprising a mass of resilient binding material and resilient 'elements distributed throughout the mass, said resilient elements being arranged in close relation to allow adjacent elements to act resiliently against each other. I

.8. A preformed compressible and elastic expansion joint strip comprising a'mass of bindin material, resilient granular elements distributed throughout the mass, and a coating of vulcanized material surrounding each of the granular a elements.-

9. A preformed compressible and elastic filling unit comprising two or more composition layers, each of which is composed of a mass of resilient binding material and resilient granular elements a distributed throughout. the mass.

10. A compressible and elastic building mate-.- rial unit comprising a commingledmass of granular material and rubber binding material.

11, A compressible'and elastic building material comprising a core of a. commingled mass of granular material and rubber binding material, and a covering of a'sphaltic material.

12. The method-oi producing building material comprising coating the ihdividual granules of a mass of granular material with rubber material, and forming the rubber coated mass in a sheet.

13. The method of producing building material mass of granular material with rubber material.

forming the. rubber coated mass into asheet, and

covering the sheet with asphaltic material.

14. A compressible-and elastic building material unit comprising granules of elastic material and a binding material holding said granules together and cooperating therewith whereby the comprising coating the individual granules of a elastic material and a suitable binding material holding said oo-mingled mass of granular elastic material together and cooperating therewith whereby the stripis readily compressible and contractlble in character. V

17. A preformedcompressible and elastic expansion. joint strip comprising cork granules, and 7 a resilient binding material for said cork-granules.

1 8. A preformed compressible and elastic expansion joint strip comprising a mass of vulcanized binding-material and resilient elements distributed throughout said providing masscontractible and expansible with the bindi material. r

19. A compressible and elastic building material comprising a mass 01' resilient granules and 'vulcanized binding material. i 20. A compressible and elastic building material comprising a mass of resilient cork granules and vulcanized binding material.

21. An expansion joint for separating spaced rigid sections of slimming or flooring construction comprising a strip interposed between the spaced sections of such construction, said strip comprising a body composed essentially of cork granules agglomerated by a suitable binder ca- .pable of cooperating with the compressibility of g i no portions in which the resilient elements are fully the cork granules whereby the strip may be compressed without oozing i'rom the space between the sections and will expand upon contraction of said sections. j v v 22. An expansion ioint for separating spaced rigid sections of a building or flooring construction comprising a strip interposed between the spaced sections of such construction, said strip comprising a body composed essentially of resilient granules agglomerated by a suitable binder 1o capable of cooperating with the compressibility of the resilient granules whereby the strip may be compressed without oozing trom the space between the sections and will expand upon contraction of said sections.

. ll ALBERT C. HSCHERi 

